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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/arm/mach-bcm/bcm_5301x.c
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/*

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 * Broadcom BCM470X / BCM5301X ARM platform code.

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 *

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 * Copyright 2013 Hauke Mehrtens <[email protected]>

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 *

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 * Licensed under the GNU/GPL. See COPYING for details.

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 */

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#include <asm/mach/arch.h>

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#include <asm/siginfo.h>

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#include <asm/signal.h>

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#define FSR_EXTERNAL		(1 << 12)

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#define FSR_READ		(0 << 10)

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#define FSR_IMPRECISE		0x0406

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static const char *const bcm5301x_dt_compat[] __initconst = {

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	"brcm,bcm4708",

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	NULL,

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};

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static int bcm5301x_abort_handler(unsigned long addr, unsigned int fsr,

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				  struct pt_regs *regs)

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{

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	/*

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	 * We want to ignore aborts forwarded from the PCIe bus that are

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	 * expected and shouldn't really be passed by the PCIe controller.

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	 * The biggest disadvantage is the same FSR code may be reported when

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	 * reading non-existing APB register and we shouldn't ignore that.

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	 */

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	if (fsr == (FSR_EXTERNAL | FSR_READ | FSR_IMPRECISE))

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		return 0;

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	return 1;

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}

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static void __init bcm5301x_init_early(void)

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{

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	hook_fault_code(16 + 6, bcm5301x_abort_handler, SIGBUS, BUS_OBJERR,

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			"imprecise external abort");

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}

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DT_MACHINE_START(BCM5301X, "BCM5301X")

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	.l2c_aux_val	= 0,

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	.l2c_aux_mask	= ~0,

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	.dt_compat	= bcm5301x_dt_compat,

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	.init_early	= bcm5301x_init_early,

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MACHINE_END

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